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-rw-r--r--utils/conntrack_create_nat.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/utils/conntrack_create_nat.c b/utils/conntrack_create_nat.c
new file mode 100644
index 0000000..591f1bb
--- /dev/null
+++ b/utils/conntrack_create_nat.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+#include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.h>
+
+int main()
+{
+ int ret;
+ struct nfct_handle *h;
+ struct nf_conntrack *ct;
+
+ ct = nfct_new();
+ if (!ct) {
+ perror("nfct_new");
+ return 0;
+ }
+
+ nfct_set_attr_u8(ct, ATTR_ORIG_L3PROTO, AF_INET);
+ nfct_set_attr_u32(ct, ATTR_ORIG_IPV4_SRC, inet_addr("1.1.1.1"));
+ nfct_set_attr_u32(ct, ATTR_ORIG_IPV4_DST, inet_addr("2.2.2.2"));
+
+ nfct_set_attr_u8(ct, ATTR_ORIG_L4PROTO, IPPROTO_TCP);
+ nfct_set_attr_u16(ct, ATTR_ORIG_PORT_SRC, htons(20));
+ nfct_set_attr_u16(ct, ATTR_ORIG_PORT_DST, htons(10));
+
+ nfct_set_attr_u8(ct, ATTR_REPL_L3PROTO, AF_INET);
+ nfct_set_attr_u32(ct, ATTR_REPL_IPV4_SRC, inet_addr("2.2.2.2"));
+ nfct_set_attr_u32(ct, ATTR_REPL_IPV4_DST, inet_addr("1.1.1.1"));
+
+ nfct_set_attr_u8(ct, ATTR_REPL_L4PROTO, IPPROTO_TCP);
+ nfct_set_attr_u16(ct, ATTR_REPL_PORT_SRC, htons(10));
+ nfct_set_attr_u16(ct, ATTR_REPL_PORT_DST, htons(20));
+
+ nfct_set_attr_u8(ct, ATTR_TCP_STATE, TCP_CONNTRACK_LISTEN);
+ nfct_set_attr_u32(ct, ATTR_TIMEOUT, 100);
+
+ nfct_set_attr_u32(ct, ATTR_SNAT_IPV4, inet_addr("8.8.8.8"));
+
+ h = nfct_open(CONNTRACK, 0);
+ if (!h) {
+ perror("nfct_open");
+ return -1;
+ }
+
+ ret = nfct_query(h, NFCT_Q_CREATE, ct);
+
+ printf("TEST: create conntrack (%d)(%s)\n", ret, strerror(errno));
+
+ if (ret == -1)
+ exit(EXIT_FAILURE);
+
+ nfct_close(h);
+}